2.5 tdi Oil Leak

[bobh6742]

Hi

can anyone suggest the source if thus oil leak ( see picture attached)


Thanks In advance


Bobh

[Chema.RB]

It looks from the oil pan, but without wemoving some covers it's going to be complicated to check

[bobh6742]

Thanks Chema.RB

Cleaned everything and I'm pretty certain it must be a leaking crankshaft seal ��

Bobh

[Crasher]

It is usually the iron block rusting under the the ally front oil seal holder which causes a leak from the main oil drilling, obviously you do the crank seal at the same time just in case, however a leaking crank seal is a sign of the crankcase ventilation system being blocked. Taking off the seal plate is a BIG job though, meaning dropping the upper sump if you are to a avoid pushing silicon sealant into the sump when rebuilding and causing a new leak. IF you use the correct Teflon seal rather than the earlier rubber spring loaded design, remember that the seal and its running face MUST be spotlessly clean and dry with no oil or the new seal will not bed in.